Programmer Think

1, Introduction to Unsafe class If you have seen the source code of JUC, I believe you will not be unfamiliar with the Unsafe class. The bottom core of the whole JUC is the Unsafe class. The Unsafe class is located in sun A class under misc package, which is a tool class (underlying c + + implementation) provided by jdk to directly access oper ...

preface Code demonstration environment: Software environment: Windows 10 Development tool: Visual Studio Code JDK version: OpenJDK 15 Sound effects and music Basic knowledge of sound effect When we play games, we may hear sound effects, but we don't really pay attention to them. Because I want ...

preface Among the queues provided by jdk, there are blocking queues and non blocking queues Blocking queue refers to: when adding elements, if the queue is full, the currently queued thread will be blocked, and the queued thread will be put into the synchronization condition queue of AQS. After the queue element is out of the queue, it will tr ...

Install JDK Uninstall the JDK pre installed in the system. Linux comes with java, but it cannot be compiled without javac, so it needs to be uninstalled and reinstalled rpm -qa | grep openjdk Perform uninstall. Use -- nodeps to ignore dependencies during uninstall [root@localhost ~]# rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.161-2. ...

1, SpringBoot project environment IntelliJ IDEA 2018.3.2Mysql 5.1 2, Tencent cloud CentOS 7.6 image server Students can apply for Tencent cloud student exclusive, 27 yuan for three months 3, Attention (1) XShell Modify host namehostnamectl set-hostname master #Set to master name View current hostnamehostname After modifying the hos ...

JDK source code learning 06 currenthashmap analysis The principle of CurrentHashMap is very complex. You can only record what you understand. As we all know, the thread safety implementation principle of CurrentHashMap is Synchronized+CAS. Now let's take a look. Brief reading of notes * Overview: * The main design goal of this hash table is ...

1, String related classes 1. Create string Properties of String public final class String implements java.io.Serializable, Comparable<String>, CharSequence { /** The value is used for character storage. */ private final char value[]; /** Cache the hash code for the string */ private int hash; // Default to 0 Specific JDK API St ...

java source code analysis - runtime annotation processor In the previous "java source code analysis - basic principles of annotation", we learned some basic concepts and principles of annotation. At the end of the article, we also clicked on the annotation processor. At that time, I said that annotation information is actually obtain ...

For image download, domain name resolution and time synchronization, please click Alibaba open source mirror station 1, maven uninstall maven only configures the environment variable and local warehouse when it is used. We only need to delete the local warehouse and remove maven's environment variable from the environment variable. 1. Delete ...

preface In this article, I will describe the most important and developer friendly features of Java since version 8. Why do you have such an idea? On the Web, you can find many articles containing a list of new features for each java version. However, due to the lack of articles, it is not possible to briefly outline the most important changes ...